Scraper sharpener



SCRAPER SHARPENER' Filed Nov. 10, 1947 L I I IN V EN TOR.

W526i. (4/. JsgmsLLs Patented Sept. 20, 1949 UNITED STATES PATENT OFFICE SCRAPER SHARPENER 7 George Walter Jerrells, Seattle, Wash.

Application November 10, 1947, Serial No. 784,965

,1 I This invention relates to means designed for the sharpening of scrapers of that type comprising a metalblade that is formed with a straight scraping edge sharpened at a square angle, that is, sharpened straight across the blade body at a ninety-degree angle to the planesof the sides of the blade; such scrapers being used extensively in meat markets for cleaning the top surface of the chopping block.

It is the principal object of this invention to provide a novel means whereby the operation of sharpening the blade edge will be greatly. expedited. I

It is also an-object ofthe invention to provide a scraper sharpener comprising means for holding a flat file, and including paired guides between which the scraper blade may be moved reciprocally in contact with the file surface to sharpen the blade edge and which guides will hold the blade in a plane perpendicular to the file while so actuated, thus to insure the sharpening of the blade edge at the desired square, ninety-degree angle.

It is also an object of theinvention to provide a sharpener of the above stated kind wherein the file may be laterally. shifted relative to the guides so that practically all of its surface may be utilized for sharpening.

Yet; another object of the invention is to provide the sharpener with a base member having a stop or abutment at one end that may be engaged against the edge of the table or'block on which the device is placed for use, to aid in holding the device against endwise movement during a blade sharpening operation and to eliminate the requirement for clamps ,or other securing means for this purpose. 7

Still further objects of the invention reside in the details of construction and combination of parts, and in the mode of use of the device, as will hereinafter be fully described.

In accomplishing these and other objects of the invention, I have provided the improved details of construction, the preferred forms of which are illustrated in the accompanying drawings, wherein- Fig. 1 is a perspective view of a scraper sharpener embodied by the present invention, and i1- lustrating also the mode of applying a scraper thereto for a sharpening operation.

Fig. 2 is a vertical cross-section of the sharpener.

Fig. 3 is a top view of the file holder and scraper guide members comprised in the device.

Fig. 4 is a top view of the base member of the '2 Claims. (01. 76-88) 2 sharpener, with the scraper guides removed therefrom for a better showing of the file containing recess that is formed in the top surface of the base member. 7

Fig. 5 is a side view of the-sharpener showing the abutment or stop flange at one end of the base member as engaged against the edge of the sharpener support.

Fig. 6 is a front end view of the device.

Referring more in detail to the drawings In its present preferred form of construction, the scraper sharpener comprises a rather elongated, rigid base member ID that is adapted to lie flatly upon a supporting surface such as a table top, 'or top surface of a meat chopping block. Preferably, this base member is cast of aluminum, or other suitable metal, but may also be hard wood, or plastic and still quite satisfactorily serve its purpose. As observed in Fig. 2, the base member ID is of an inverted channel form and comprises the opposite side flanges Illa-Illa and a fiat surfaced top Wall I013. In a practical size for its intended use, it is approximately ten inches long, two inches wide and one inch deep, but these dimensions are in no way critical.

At its forward end, the base If! is formed with aid in the proper holding of the device during use. In Fig. 5, this stop I2 is shown as engaged against the edge of a support, designated at [3, upon which the base is disposed for use.

Formed lengthwise of the base, within the top surface of the top wall like, and to its full length, is a shallow recess IS in which a flat file 16 of a common, well known type may be located as shown in Figs. 1, 2 and 4. At one end, this recess opens as shown in Figs. 1 and 4 to the end of the base; the recess being of a width that permits the file to be inserted and withdrawn from the recess endwise. At its other end, the recess has a restricted central opening I 8 through which the prong I61: of the file only may be extended; the shoulders at the end of the file, adjacent opposite sides of the prong portion I613, will engage against the shouldered end surface 19 of the recess as opposite sides of openin I8 to hold the file against endwise shifting in the direction of this end of the recess. It is shown also in Fig. 4, that the recess I5 is of such width that the file may be moved laterally to limited extent for a purpose presently apparent.

Fixed upon the base l0, lengthwise thereof, are

two guide members 20-20 of angle bar form. These guides have horizontal base flanges 20a secured. by' screws 2! flatly upon the top surface of the base member, as will be understood by reference to Fig. 2. They also have vertical flanges 201) that are disposed in a slightly spaced and parallel relationship to provide a guide slot 2! between them of a width designed to receive the blade portion of a scraper between them for sharpening as has been; illustrated in Figs. land 2, wherein the scraper is designated in its entirety by numeral 25 and its blade is designated, by numeral 25m.

The guide members 2l2 are secured. suffie ciently close together to retain the blade in a perpendicular position relative to the-top surface of the file as disposed in channel 15; but not. to bind the blade to any extent. To accommodate blades of different thickness, the horizontal flange of one of the guide members has somewhat elongated, transversely directed slots, as at 26 in. Fig. 3, to; receive the screws. When the screws as applied through the slots; are loosened, the guide may be adjusted to provide, aslot, of more or less width. Tightening of; the screws; then secures; the: guide at the adjusted. position.

With the device so constructed; it; is used by placing the. base member Hi; flatly upon a slipporting; surface; such as? a; table top, with. the flange l=;2-engagediagainst; the table edge. Then a file It. is inserted inthe; recess as shown in: Figs; 1: and 4'1. The: blade of the scraper to. be sharpened is. then applied to the slot 21!, shown in. Fig 1, and. the scraper is reciprocallyactuated with the lower edge of its, blade flatly in contact with the file, Pressure asrequi-recl'is: placed on; the. blade to obtain the desired sharp-- ening effect, The filemay be shifted from. side. to; side. in. the slot: so. as to takev advantage: of. a greater; part of its surface, andit may; be. reversednin position to obtain; use of both sides.

In order that the file may be held at a set position of lateral aizljustmentv in the recess; I

have provided; a. clamp plate 30 that, is set in a transverse recess 3| in the channel. i5; near its.- open; end' as. showrr in..Fig. 4. The file overlies this plate and; the plate may. be lifted to clamp. the file againstthe under sidezof the flanges. 29s by means of a set;screw.33 that is threaded up; throughthe bottom wall: as. has. been shown. in Fig, 6

Sharpeners; of this kind will accurately hold the blade at; the proper sharpening angle to. get an. even square. cut edge that is required for satisfactory use of scrapers. of this kind:. No. clamp; is. required to hold the. device in place;

.4 and due to the longitudinal flanges along op-' posite side edges of the base Ill, that engage with the supporting surface, there is no tendency for the device to rock laterally on the support.

Changes in size, proportion and materials may be made without departing from the spirit of the invention.

Having thus described my invention, what I claim as new therein, and. desire to secure by Letters Patent is 1.

l. A scraper sharpener comprising a horizontal base member designed to rest flatly upon a table top for its functional support and having a depending flange at one end for engaging against, the table edge; said base member having a recess formed to its full length centrally ofits. top surface a file blade disposed flatly therein, said recess being of slightly greater depth than the file thickness and of greater width than the file to permit lateral shifting of the file therein, and open. to, its full width at one endfor the insertion or removal'of the file,

and. having; a restricted opening centrally atits,

other end for passageof the file tang with looseness and providing abutments atopposite sides of the opening against which. that end of the file will engage, and; a pair of: guide bars fixed in. parallel, member, lengthwise of. the. recess, providing an intermediatesl'ot; openat, its ends; andadapted to receive; the, blade; of a scraper therein for a sharpening; operation; said. gui e. r b i of angle iron form and each having a horizontal flange fixed to the base member, anda vertical flange, said vertical; flanges defining theslOt and.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS- Number Name Date 527,350- Taylor Oct. 9, 1894 1,081,606 Gray et al Dec. 16, 1913 1',388 ,659= Mitchel-l- Aug. 23, 1921 1,594,246 Dechert July 27, 1926- spaced, relationship onthe base 

